vision therapy Flashcards
vision screening assessment
acuity- near and far
eye mvmt- commitancy and paresis/palsy
convergence
visual fields- midline concept
OT
visual fixation targets-vary direction of gaze, vary backgrounds
glare control- reduce lighting, visors are great in TBI
visual feedback- provide for self monitoring, use flashlights, dowels, laser pointers, help carry out in-patient “home” vision therapy activities
help insure proper eyeglass use
Myopia
(nearsighted) see ok close; far away is blurry 30% of population
Hyperopia
(far-sighted) distant objects are clear but not close up
Presbyopia
(age related loss of focus)
convergence
accurate aim of eyes on object & tracking it as it moves closer and further in distance = pointing system
Up to 42% of those with TBI have decreased convergence
Double vision
Closes an eye
Headaches
Pain
Reading problems, blurred near print, decreased depth perception
Accommodation
Accurate focus on an object, sustain focus when glancing at objects of different distances 10% of TBI cases Blurred vision Headaches Squinting Double vision Eye pain Reading problems
Tracking
Up to 40% of ABI have (acquired brain injury) Pursuits & saccades are difficult Can’t follow objects Lose place when reading Nystagmus (congenitial vs acquired)
Strabismus
=eye turn 10-25% of ABI have Closing of an eye Double vision Head turn or tilt Poor depth perception
Visual Field Defects
32% of all ABI have
Hemianopsia, quadrantanopsia
Visual neglect (hemi-imperception)
Visual Midline Shift (away from affected side)
Visual Field Defects
Sx’s: Bumping into objects Tunnel vision Poor night vision Drifts to 1 side when walking Holds onto walls, people, etc.
flashlights
to organize eye, hand and body mvmt in visually directed and monitored spatial operations
hart chart fixations
to improve the ability to organize and track visually
